Review | Constants a mass moving in a circle of radius R with angular velocity w. =R cos(ust)i + sin(wt)} R cos(wt)i + R sin(wt)j. Part C The main point of the problem is to compute the acceleration using geometric arguments. (Figure 1) What is the average acceleration of the mass during the time interval from -t to t? (Eigure 3) Express this acceleration in terms of R, w, t, and the unit vectors i and j. Figure 1 of 3> > View Available Hint(s) davel-t, t) = Cot Submit

Review | Constants a mass moving in a circle of radius R with angular velocity w. =R cos(ust)i + sin(wt)} R cos(wt)i + R sin(wt)j. Part C The main point of the problem is to compute the acceleration using geometric arguments. (Figure 1) What is the average acceleration of the mass during the time interval from -t to t? (Eigure 3) Express this acceleration in terms of R, w, t, and the unit vectors i and j. Figure 1 of 3> > View Available Hint(s) davel-t, t) = Cot Submit

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Description: O https://openvellum.ecollege.com/course.htmlReview | Constantsa mass moving in a circle of radius R with angularvelocity w.F(t) = R cos(wt)i + sin(wt)j= R cos(wt)i +R sin(wt) j.Part CThe main point of the problem is to compute theacceleration using

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 88CP: The first atomic bomb was detonated on July 16, 1945, at the Trinity test site about 200 mi south of...

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The first atomic bomb was detonated on July 16, 1945, at the Trinity test site about 200 mi south of Los Alamos. In 1947, the U.S. government declassified a film reel of the explosion. From this film reel, British physicist G.I. Taylor was able to determine the rate at which the radius of the fireball from the blast grew. Using dimensional analysis, he was then able to deduce the amount of energy released in the explosion, which was a closely guarded secret at the time. Because of this, Taylor did not publish his results until 1950. This problem challenges you to recreate this famous calculation. (a) Using keen physical insight developed from years of experience, Taylor decided the radius rof the fireball should depend only on time since the explosion, t, the density of the air, , and the energy of the initial explosion, E. Thus, he made the educated guess that r=kEabtcfor some dimensionless constant kand some unknown exponents a,b, and c. Given that [E]=ML2T-2 , determine the values of the exponents necessary to make this equation dimensionally consistent. (Hint: Notice the equation implies that k=rEabtcand that [k]=1 ). (b) By analyzing data from high-energy conventional explosives, Taylor found the formula he derived seemed to be valid as long as the constant khad the value 1.03. From the film reel, he was able to determine many values of rand the corresponding values of t. For example, he found that after 25.0 ms, the fireball had a radius of 130.0 m. Use these values, along with an average air density of 1.25kg/m3 , to calculate the initial energy release of the Trinity detonation in joules (J). (Hint: To get energy in joules, you need to make sure all the numbers you substitute in are expressed in terms of SI base units.) (c) The energy released in large explosions is often cited in units of “tons of TNT” (abbreviated “t TNT”), where 1 t TNT is about 4.2 GJ. Convert yow answer to (b) into kilotons of TNT (that is, kt TNT). Compare your answer with the quick-and-duty estimate of 10 kt TNT made by physicist Enrico Fermi shortly after witnessing the explosion from what was thought to be a safe distance. (Reportedly, Fermi made his estimate by dropping some shredded bits of paper right before the remnants of the shock wave hit him and looked to see how far they were carried by it.)
The arc length formula says the length sof arc subtended by angle in a circle of radius r is given by the equation s=r . What are the dimensions of (a) s, (b) r , and (c) ?
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4:02 A moodle1.du.edu.om P Flag question The time (in seconds) and position (in cm) of a bubble in a constant velocity tube is (3, 30), (6, 40), (8, 50), (10, 55) and (11, 60). Draw a graph to obtain the equation of the bubble. From this equation, calculate the position of the bubble after 10 seconds. Select one: O a. 55ст O b. 75cm C. None of these answers d. 70ст O e. 40ст Previous page Finish attempt ...
Determine the magnitude of the horizontal reaction (N) at A if P = 255 N and Q = 2324 N. Let x = 2.43 m, y = 2.49 m, and z = 2.09 m. Round off only on the final answer expressed in 3 decimal places. Instead of units, indicate the direction of the horizontal reaction at A: use Rif to the right and L if to the left. ... B L- y
Express the units of O O O ms-1 ms-2 ms2 kg ms kg Previs gD Ap where g is gravitational acceleration (ms), fis Coriolis parameter (s), 42 is depth change, pis density (kg m) and Ay is a meridional distance change. of Ay Next
if Å = 2êx-3êy+ ê, ez Calculate: dire ction of A.C
1%A9 li. t LTET 4G+ Vol) O A X O U 9:-7 Second H.W.pdf 1. Draw and label the vector with these components. Then determine the magnitude and angle of the vector. a- Az = 3 ,A, = -2 b- B, = -2 ,B, = 2 2. What is the speed of horse in meter per second that runs a distance of 1.2 miles in 2.4 minutes? 3. A car moving along X- axis according on the function: X (t) = 2 t2 + 5t +7 on [1,2] Find: a- The average velocity. b- The acceleration at 3s. 4. Julie is walking around a track at a 2m/s for some exercise. She then decides to start jogging so she accelerates at a rate of 0.5m/s? for 3 seconds. How far did Julie travel from the time she started to accelerate to the end of the 3 seconds? 5. Ralph uses a 2000 to do this. force to push his car along a road for 1000 m. It takes him500 s a- Calculate the amount of work that Ralph did on the car. b- Calculate the amount of power that he generated. II
O Gilen the Vectors ů = 2 -j+ K ad 7 = 3i -3j + K fird the product ūy. Also Peo Gnd campre it with fiad üx ehat is 4-V? firsd The between u.V ongle e Wnte te pelor coordinste equation for Velecity and f define the 'terms.
Please answer #18 Analyze the problems carefully, then solve them. Be systematic when answering. Write the given, label them; the required; and all calculations pertinent to the problem. Express your numerical answers with the appropriate number of significant figures.
Convert and put the following in standard form30 km to m35 cm to m220 Mg to g0.03 mm to m29 ns to s50 Gw to wto m